Selecting device



June 3o, 1936. W, HENTZ 2,046,072

SELECTING DEVICE Filed May 18, 1955 2 Sheets-Sheet 1 /Zaf l 3i H2- IJ a Z 'llIIIIllI/II June 399 V1936. w. HElNlTz SELEGTING DEVICE 2 Sheets-Sheet 2 f /7//6/1 afs Fil ed May 18, 1935 zar' Hei/l@ Patented June 30, 1936 UNITED STATES PATENT vOFFICE y ancore sanremo. DEVICE Application May 1s, 1935, serial No. 22,253: In Germany July 2, 1934 ZCIaims.

The present invention relates to a selecting device for individually movable presser instruments in straight bar knitting machines.

The problem of bringing individually movable presser instruments commonly or in groups temporarily out of range of the frame needles is solved a'ccording to the invention in a simple manner by providing beneath the presser instruments selecting bars and a return bar which act l upon projections of the presser instruments.

The device is intended for interrupting the loop formation on the needles provided for knitting the instep portion of a stocking or the like, so that knitting is effected in the heel portions only while the loops of the instep portion are placed in suspense. Furthermore, the device is intended for knitting the beginning row of the sole por- Y tions or the like. For this purpose the individually movable presser instruments are brought into I different positions of .height in the direction of the axis oi the frame needles. 'I'his is effected by providing the selecting bars with notches, re-

cesses or the like, so that for instance each alternate presser instrument is lifted while the other i presser instruments remainin their position of rest.

On account of the di'erent position of height of the presser instruments, one group of the frame needles, i. e. that group of needles lying opposite l the lifted presser instruments, is, after sinking, pressed olf in a higher position, while the other group, lying opposite the presser instruments which remained intheir lower position, is not pressed off at all. By this means the sunk thread i loops in the first row, i. e. the beginning row, are shifted over the head of the first, third, fifth, seventh needle and so on but locked in in the head of the second, fourth, sixth, eighth needle and so on, or, vice versa, the sunk thread loops I are shifted over the head of the needles of even number, but locked in in the head of the needles of odd number, so that in the second row the formation of new loops may be effected on all the needles in a well known manner.

5 In the accompanying drawings forming part of the specication two embodiments of the invention are shown by way of example.

Fig. 1 shows in elevation a division with the selecting device for interrupting the loop forma- I tion in the instep portion of a stocking or the like,

in Fig. l,

Fig. 3 is a section on the line 3-3 of Fig. 1, i Fig. 4 shows in `elevation a division with the Fig. 2 is aside-elevation of the device shown (Cl. 66-98I 'selecting device for interrupting the loop formation in the instep portion of a stocking or the like and for the formation of albeginning row in the sole portions,

Fig. 5 is a side elevation of the device shown in 5 Fig. 4,

Fig. 6 is a section on the line 6-6 oi' Fig. 4,

. Fig. '7 is a section on the line 1-1 of Fig. 4,

Fig. 8 is a side view showing the selecting device moved into the position ready for operation, 10

Fig. 9 is a side view similar `to that of Fig. 8 showing the selecting device in the elevated position,

Fig. 10 is a front elevation of one of the laterally arranged selecting bars, and l5 Fig. 11 is a detail view of a portion of the device.

Mounted at the jack sinker bearing I which, for the sake of clearness, is not shown in Figs. 1 and 4 are, as illustrated in Figs. 2, 3 and 5-9, presser instruments 2 which are held by a bar 3 extend- 20 lng over the whole width of the division. At the lower end of each presser sinker 2 two oppositely directed projections 4 and 5 are provided.

In the frame oi.' the machine, not shown in the drawings, a rock shaft 6 is journalled which 25 extends in the longitudinal direction of the machine in a plane below that of the jack sinker bearing I. Connected to the rock shaft 6 is a lever 'I carrying at its free end a shiftable roller 8 adapted to cooperate with a cam II and a cir- 30 cular disc II respectively mounted on a cam shaft I0 which also is journalled in the machine frame and extends in the longitudinal direction of the machine in a plane below that of the rock shaft 6. Aspring 9, connected with its ends re- 35 spectively to a projection of the lever 'I and to a fixed portion of the machine frame, `not shown on the drawings, tends to hold the roller 8 in contact with the cam I I or with the circular disc Il depending on the position of the roller 8 with re- 40 spect to the arm 'I. Mounted on the rock shaft 6 ,are arms I2 in which bolts I 3 are journalled. Each of the bolts I3 carries afsupporting arm I 4 at the one end and a supporting arm' I 5 at the other end. 'I'he supporting arms I4 and vI5 are 45 drawn against the jack sinker bearing I by means I of springs I6 connected to said bearing and said arms. The supporting arms Il carry supporting bars I1, I8. 'I'he supporting bar I1 carries a selecting bar I9, while the supporting bar I8', ar- 50 ranged behind the supporting bar I'I, carries a selecting bar 2U. The selecting bars I9 and 20 are adiustably connected to their supporting bars I 1 and .I8 respectively by means of screws 2| passing through elongated holes 2|' in said bars. 55

The numberfof the presser instruments 2 which may be brought out ofthe range of the frame needles 30 may be altered by adjusting the selecting bars kI9 and 20. The'selecting bar i9 extends below -projections 4 one of which is provided at the lower end of each of the presser instruments 2 at' the front face of same, and the selecting bar 20 extends below projections 5 one of which is provided at the lower end of each of the presser instruments 2 at the rear face of same.

Fixed to the supporting arms I5 is a return bar 22 the upper portion 3| of which is bent.

The bent portion 3| of this return bar 22 engages vover the rearwardly extending projections 5 of the presser instruments 2.

If the roller` 8 on the lever 1 is shifted so as to cooperate with the cam I! andif then the lever 1 is lifted by means of the cam `Il I, the arms I2 and thereby the supporting arms I4 and I5 are raised. Hereby the presser instruments 2 are raised by means of the selecting bars I9, 20 carried by the supporting bars I1, I8, `so that the heads of the presser instruments 2 are brought out of the range of the frame needles 30. 'Fl-'1e return bar 22 is raised simultaneously and is, on the downward vmovement of the lever 1, aiso moved downwardly, carrying with it the presser instruments 2 into their original or exit position.

The selecting bars I9, 20 are provided at that part of the division only at'which presser instruments 2 are to be selected. According to the example shown in Figs. 1'-3, the selecting bars are intended for interrupting the loop formation on the needles adapted to knit the instep portion of a stocking or the like, so that the heel portions only are knitted, while the loops of the instep portion are placed in suspense.

As the selecting bars I9, 2E are adjustably arranged upon their supporting bars I1 and I8 respectively, the number of the selected presser in- Y struments 2 may exactly be determined by adjusting one or both of the selecting bars.

' In the construction shown in Figs. l3, it has been supposed, that as a rule presser instruments 2 are selected in the middle portion of the division, where they serve to interrupt the loop v formation in the instep portion. The selecting bars may oi course also be provided at other portions, for instance at the sides of the division.

Instead of adjustably arranging both selecting bars I9, 20, only one ofA them may be arranged adigstably.

position and are used in the formation of beginning rows only. The upwardly extending por'- tions 32 of the Z-shaped selecting 'bars 23 are provided with notches, recesses or the like 24, as clearly shown in Fig. 10. These comb-like selecting bars 23 are provided with elongated holes 33 through which extend screws 33 adapted to adjustably fix them in position.

At each side of each division a plate 25, having an inclined running-on surface 26, is fixed to the jack sinker bearing I. A rod 21 (Fig. 4) which may be' displaced longitudinally is arranged in the supporting arms I4 and guided bymeans of an additional supporting arm 35 carried by an arm 34 also mounted on the rock shaft 6. Conregard tothe plates 25 the position shown in 1I Fig. 11. y

If the beginning rows of the sole portions are to be knitted, the rod 21 is moved in any suitable manner in the direction of the arrow X the stops 23 then run against the inclined surfaces 26 of the plates 25, whereby the supporting arms Ie and the additional supporting arm 35 are oscillated against the action of the springs shown in Fig. 4. The inclined surfaces 2t' of L I6. In this manner the comb-like selecting bars 2* 23 are moved into the range of the rearwardly extending projections 5 of the presser instruments 2 as showny in Fig. 8. If now. in the manner already describai, the supporting arms I4 and I5 are raisedl by means of the cam II, the 2l presser instruments 2 lying opposite a notch or recess 24 ln the upper portion 32 of the comblike selecting bars 23 rema'm in their'lower position with regard to the jack sinker bearing I,

while theother presser instruments 2 are lifted 3` as shown in Fig. 9. 0n aceount of the different positions of height of the presser instruments 2, a beginning row may now be formed by the fact, that by means of tlie raised presser instruments 2 the heads of the frame needles, affected by them, are pressed off, so that the sunk thread loops are shifted over the head of these needles, while the presser instruments 2 which are not raised do not press off the corresponding frame needles, so that the sunk thread loops are locked in in the head of tliose needles.- By adjusting the comblike selecting bars 23, other groups of presser instruments 2 may be selected. 'I'he arrangement may hereby be such that the adjustment' 4 may be mechanically effected instead' of by loosening the connecting screws 33.

The presser instruments 2 may be directly jonrnalled in the jack sinker bearing I or be connected to the latter in a manner to be moved up and down.

What I claim is:

1. In a selecting device for inchvidually movable presser instruments in straight bar knitting machines having a plurality of divisions, a. rock shaft extending in front of the divisions of the knitting machine, a spngaotuated lever fixed tcsaid rock shaft, a roller adjustably mounted on the free end ofsaid lever, a. cam shaft) arranged in parallel relation to said rock shaft, 6

a. cam and a circular disc fixed to said cam shaft and adapted to cooperate with said roller, an arm mounted on said rock shaft near each end of each division, abolt journalled in each of said arms, spring actuated supporting arms at f selecting bar adiustably connected to each of said supportirg bars, a return bar carried by said supporting arms fixed to the end of each of said bolts facing the middle of each division, `and forwardly and rearwardly directed projections at the lower end of each Dresser instrument cooperating i with said selecting lcars and said retmn. bar respectively.

2. In a selecting device for individually vmovable presser instruments in straight bar knitting machines having a plurality of divisions, a rock shaft extending in front oi the divisions of the knitting machine, a spring actuated lever iixed to said rock shaft, a roller adjustably vmounted on the free end of said lever, a cam shaft arranged in parallel relation to said rock shaft, a cam and a circular disc xed to said cam shaft and adapted to cooperate with said roller; an arm mounted on said rock shaft near each end of each division, a bolt journalled in' each of said arms, spring actuated supporting arms at both ends of each of said bolts, supporting bars arranged one behind the other and carried by said supporting arms mounted on the end of each of said bolts facing the end of each division, a selecting bar adjustably connected to each of said supporting bars, a return har carried by said supporting arms ilxed to the end of each of said bolts facing the middle of each division, forwardly and rearwardly directed projections at the lower `end of each presser instrument cooperating with said selecting bars and said return bar respectively, otherselecting bars adjustably mounted on the said front supporting bar at the sides of said iirst mentioned selecting bars, said other selecting bars having az-shaped cross section and an upwardly extending portion provided with recesses and lying normally out of the range of -said projections of said presser instruments, a

rod mounted for longitudinal displacement in said supporting arms carrying said supporting bars, stops iixed to said rod, and plates, having an inclined surface, fixed to said jack sinker bearing, said stops and plates cooperating to bring said other selecting bars provided with recesses into the range of said projections on said presser instruments.

WOLDEMAR HEINITZ. 

